The Under Armour Seattle Mariners Navy T-Shirt is a men's shirt in size L, featuring the official colors of the Seattle Mariners baseball team. It is officially licensed by Major League Baseball and is perfect for wearing during the regular season. The shirt is made by the brand Under Armour, known for high-quality athletic apparel. Made with the team's logo and colors, this shirt is a must-have for any Seattle Mariners fan looking to show their support during games or casual outings.